42 HELIOZOA. 



Order II. Heliozoa. 



The Heliozoa or sun-animalcules are usually of a 

 spherical form, with pseudopodal filaments radiating from 

 them in every direction, rarely forking or anastomosing. 

 They usually multiply by division. While the Lobosa 

 and the Filosa are essentially creeping animals, the 

 Heliozoa, or sun animalcules, are swimmers. 



Synopsis of the Genera of Heliozoa. 



Body spherical, colorless, single contractile PAO B. 



vesicle, pseudopods simple, Actinophrys, 43 



Body like Actinophrys, form variable, with 

 an envelope of protoplasm with a villous 

 surface, Heterophrys, 44 



Body like Actinophrys, single or in connect- 

 ed groups, invested with a layer of proto- 

 plasm with spicules, rays simple, Raphidiophrys, 44 



Body soft, spheroidal, amoeboid, colored ; 

 pseudopods Actinophryan, pin-like, and 

 digitate, Vampyrella, 45 



Body spheroidal, with delicate, membranous 



covering, with two oral orifices, Diplophrys, 46 



Body spherical, like Actinophrys, but the 

 outer vesicular portion distinct from the 

 inner mass, rays with an axis, Actinosphcsrium, 47 



Body Actinophryan, rays silicious, simple or 

 furcate ; also soft rays, and an investment 

 of protoplasm, Acanthocystis, 48 



